Professor Vasant Honavar, co-chaired, with professor Tim Finin of UMBC, the AAAI Fall Symposium on Semantic Web for Collaborative Knowledge Acquisition, held at Washington, DC during October 13-15, 2006. The symposium, sponsored by theAmerican Association for Artificial Intelligence, brought together researchers from academic and industrial research laboratories from around the world that are working in the relevant areas of artificial intelligence, databases, knowledge bases, machine learning, information integration, ontologies, semantic web, web services, and relevant application areas (e.g., bioinformatics, environmental informatics, enterprise informatics e-science, e-government, medical informatics, security informatics, social informatics, among others). The symposium participants shared recent advances in the state of the art in semantic web technologies for knowledge acquisition from semantically disparate, autonomous, distributed information sources for such applications. They also discussed open research problems, and areas for collaboration. In addition to contributed papers, the symposium included invited lectures by Professor Henry Lieberman of MIT and Dr. Todd Hughes of DARPA.